Hi everyone,
Today we have done a experiment with water and the Bunsen burner.
Aim: To demonstrate how to heat a liquid inside a test tube.
Equipment: Bunsen Burner,Heatproof mat,Lighter,Test tube,Test tube tongs,Safety gasses.
Method:
1. Light the Bunsen Burner.
2. Fill you test tube to approximately 5ml water.
3. Turn the collar at the Bunsen burner so it's a blue flame
4. Holding the test tube with test tube tongs,tilt the test tube on a 45 degree angle and place the bottom of the tube into the FlameEnsure that the mouth of the tube is not pointing towards anyone.
5. Gently wave the test tube in and out of the flame. Remember you are trying to heat the liquid gently.
6. Once the water starts to gently bubly,take it away from the flame. carefully pour the hot water into the sink.
Questions:
1. explain why it is important that the test tube is held at 45 degrees? It's important to hold the test tube 45 degrees because if you keep it in one place it will urn the test tube.
2. Suggest why the test tube is moved I and out of the flame instead of keeping in in one place? I think because it will get too hot.
No comments:
Post a Comment
To support my learning I ask you to comment as follows:
1. Something positive - something you like about what I have shared.
2. Thoughtful - A sentence to let us know you actually read/watched or listened to what I had to say
3. Something helpful- how have you connected with my learning? Give me some ideas for next time or ask me a question.